Amid all the market volatility and weakness in the financial sector of late, you may have missed this WSJ front page story: "States Go After Big Bank on Forex".

The story is about growing scandal in the banking industry centered around banks allegedly overcharging pension funds for currency transactions.

"Attorneys general in Virginia and Florida filed civil suits against BNY Mellon alleging that the bank cheated pension funds in those states by choosing improper prices for currency trades the bank processed for the funds," The WSJ reports. "The Virginia lawsuit, filed in a Fairfax, Va., state court, cites internal bank emails allegedly showing that senior bank officials knew about, and endorsed, a currency-trading method that hurt state pensioners."

In addition to Virginia and Florida, California and Tennessee are also suing BNY Mellon and State Street Corp. over the alleged fraud.

The man who uncovered the alleged scam, Harry Markopolos, expects all 50 states to eventually join the suit. If the name sounds familiar that's because Markopolos was a whistleblower on the Madoff Ponzi scheme, only to have his claims ignored by the SEC for the better par of a decade. (See: Harry Markopolos Says Big Banks Worse Than Madoff)